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https://issues.apache.org/jira/browse/HBASE-5021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13169856#comment-13169856
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Phabricator commented on HBASE-5021:
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nspiegelberg has commented on the revision "[jira] [HBase-5021] Enforce upper
bound on timestamp".
@stack : sounds good. I kind of thought they were slightly different
features myself but thought I'd get outside confirmation. Timestamp is a
specific, explicit optimization of the LSMT algorithm, where Constraints are
more implicit, application-specific schema enforcement.
REVISION DETAIL
https://reviews.facebook.net/D849
> Enforce upper bound on timestamp
> --------------------------------
>
> Key: HBASE-5021
> URL: https://issues.apache.org/jira/browse/HBASE-5021
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Critical
> Fix For: 0.94.0
>
> Attachments: D849.1.patch
>
>
> We have been getting hit with performance problems on our time-series
> database due to invalid timestamps being inserted by the timestamp. We are
> working on adding proper checks to app server, but production performance
> could be severely impacted with significant recovery time if something slips
> past. Since timestamps are considered a fundamental part of the HBase schema
> & multiple optimizations use timestamp information, we should allow the
> option to sanity check the upper bound on the server-side in HBase.
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